<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			h3 {
				color: green;
			}
			p{
				color: red;
				font-size:1rem ;
			}
			.bar{
				font-size:1.25rem;
				color: #008000;
			}
			#one{
				font-size: 3.125rem;
				color: #0000FF;
			}
		</style>
	</head>
	<body>
		<h3>北京欢迎你</h3>
		<p>北京欢迎你，有梦想谁都了不起！</p>
		<p class="bar" id="one" >有勇气就会创造奇迹。</p>
		
	</body>
</html>
